Created
March 1, 2014 02:07
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| import math | |
| def fibonacci(index): | |
| if(index < 1): | |
| return -1 | |
| return int(1/math.sqrt(5) * math.pow(((1 + math.sqrt(5)) / 2), index) - 1/math.sqrt(5) * math.pow(((1 - math.sqrt(5)) / 2), index)) |
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